Top 20 JAMZ Countdown

INDIANAPOLIS, IN - FEBRUARY 05: LMFAO member Redfoo performs during the Bridgestone Super Bowl XLVI Halftime Show at Lucas Oil Stadium on February 5, 2012 in Indianapolis, Indiana. (Photo by Christopher Polk/Getty Images)

19. Adele - Set Fire To The Rain

(Photo credit should read LEON NEAL/AFP/Getty Images)

British singer-songwriter Adele accepts the British Female Solo Artist award at the BRIT Awards 2012 in London on February 21, 2012. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)

18. B.o.B. - So Good

NEW YORK, NY - MARCH 01: Musician B.O.B visits SiriusXM Studios on March 1, 2012 in New York City. (Photo by Neilson Barnard/Getty Images)

17. Rihanna - Where Have You Been

(Photo by John Shearer/Getty Images for Entertainment Industry Foundation)

French DJ David Guetta poses with the 2012 Echo Music Award in the category 'Club/Dance National/International' in the press room after the Echo Awards ceremony in Berlin on March 22, 2012. The German music award granted every year by the Deutsche Phono academy awards prizes in 27 categories. AFP PHOTO / JENS KALAENE - - GERMANY OUT - - (Photo credit should read JENS KALAENE/AFP/Getty Images)

15. Wale featuring Miguel - Lotus Flower Bomb

(Photo by Cindy Ord/Getty Images)

NEW YORK, NY - APRIL 30: Wale performs during DJ ProStyle's birthday party at Hammerstein Ballroom on April 30, 2012 in New York City. (Photo by Cindy Ord/Getty Images)

14. Tyga - Rack City

(Photo by Bennett Raglin/Getty Images)

NEW YORK, NY - DECEMBER 31: Recording artist Tyga visits BET's "106 & Party" at BET Studios on December 16, 2011 in New York City. (Photo by Bennett Raglin/Getty Images)

13. Drake featuring Rihanna - Take Care

(Photo by Jesse D. Garrabrant/NBAE via Getty Images)

LOS ANGELES, CA - FEBRUARY 20: Singer Rihanna and Rapper Drake perform during half-time during the 2011 NBA All-Star Game on February 20, 2011 at the Staples Center in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. Mandatory Copyright Notice: Copyright 2011 NBAE (Photo by Jesse D. Garrabrant/NBAE via Getty Images)

12. Calvin Harris - Feel So Close

(Photo by Tim Whitby/Getty Images)

LONDON, ENGLAND - DECEMBER 03: Calvin Harris attends day one of Jingle Bell Ball at O2 Arena on December 3, 2011 in London, England. (Photo by Tim Whitby/Getty Images)

11. Wiz Khalifa/Snoop Dogg - Young, Wild, & Free

(Photo by Christopher Polk/Getty Images for Coachella)

INDIO, CA - APRIL 15: Rappers Snoop Dogg (L) and Wiz Khalifa perform onstage during day 3 of the 2012 Coachella Valley Music & Arts Festival at the Empire Polo Field on April 15, 2012 in Indio, California. (Photo by Christopher Polk/Getty Images for Coachella)

ORLANDO, FL - FEBRUARY 26: Hip-hop artists Lil' Wayne and Drake (L) sit courtside during the 2012 NBA All-Star Game at the Amway Center on February 26, 2012 in Orlando, Florida. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Ronald Martinez/Getty Images)

8. The Wanted - Glad You Came

(Photo by Jamie McCarthy/Getty Images for Tommy Hilfiger)

NEW YORK, NY - APRIL 23: (L-R) Tom Parker, Siva Kaneswaran,Jay McGuiness , Max George and Nathan Sykes of the band The Wanted shop at Tommy Hilfiger Fifth Avenue on April 23, 2012 in New York City. (Photo by Jamie McCarthy/Getty Images for Tommy Hilfiger)

7. Gotye featuring Kimbra - Somebody That I Used To Know

(Photo by Michael Buckner/Getty Images for Coachella)

INDIO, CA - APRIL 15: Musician Wouter "Wally" De Backer aka Gotye performs during Day 3 of the 2012 Coachella Valley Music & Arts Festival held at the Empire Polo Club on April 15, 2012 in Indio, California. (Photo by Michael Buckner/Getty Images for Coachella)

6. Pitbull/Chris Brown - International Love

(Photo by David Becker/Getty Images)

LAS VEGAS, NV - MARCH 30: Armando 'Pitbull' Perez, winner of the BMI President's Award, performs during the 19th Annual BMI Latin Music Awards at the Encore Las Vegas on March 30, 2012 in Las Vegas, Nevada. (Photo by David Becker/Getty Images)

5. Chris Brown - Turn Up The Music

(Photo by Brendon Thorne/Getty Images)

SYDNEY, AUSTRALIA - APRIL 15: Chris Brown performs live on stage during Supafest 2012 at ANZ Stadium on April 15, 2012 in Sydney, Australia. (Photo by Brendon Thorne/Getty Images)

4. Nicki Minaj - Starships

(Photo by Danny Martindale/Getty Images)

LONDON, ENGLAND - APRIL 19: Nicki Minaj signs copies of her number one album 'Pink Friday: Roman Reloaded' at HMV Whiteleys on April 19, 2012 in London, England. (Photo by Danny Martindale/Getty Images)

3. fun. - We Are Young

(Photo by Charles Eshelman/Getty Images for Spotify)

NEW YORK, NY - NOVEMBER 30: (L-R) Andrew Dost, Nate Ruess and Jack Antonoff of the band Fun attend Spotify knocks it out of the park at Stephen Weiss Studio on November 30, 2011 in New York City. (Photo by Charles Eshelman/Getty Images for Spotify)

2. Flo Rida featuring Sia - Wild Ones

(Photo by Ryan Pierse/Getty Images)

MELBOURNE, AUSTRALIA - APRIL 15: Musician Flo Rida arrives at the 2012 Logie Awards at the Crown Palladium on April 15, 2012 in Melbourne, Australia. (Photo by Ryan Pierse/Getty Images)